27 real Electrical Safety & Regulation questions from the Plant & Utility Ops bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.
1. What is Five safety rules?
Junior
A.each worker fits a personal lock and tag on every isolation point after switching off and testing for dead, so no one can re-energise the circuit until the last lock is removed
B.isolate, secure against reconnection, verify dead with a tested detector, earth and short-circuit, then screen adjacent live parts, in that order before any work
C.NFPA 70E categories 1 to 4 correspond to arc ratings of 4, 8, 25 and 40 cal/cm², selected from the incident energy calculated at the working distance
D.full-body harness with double lanyard anchored above about 1.8 m, ladders at a 4:1 slope, and no work near live overhead lines from ladders or structures without a permit and discharge
2. Which term means: "isolate, secure against reconnection, verify dead with a tested detector, earth and short-circuit, then screen adjacent live parts, in that order before any work"?
A.Five safety rules — CEA schedule of minimum distances from exposed live parts for work: 2.6 m at 12 kV, 2.8 m at 36 kV, 3.1 m at 72.5 kV, 3.7 m at 145 kV, 4.3 m at 245 kV and 6.4 m at 420 kV
B.Five safety rules — IEC 60479 places the onset of fibrillation near 30–50 mA for a few hundred milliseconds, which is why 30 mA residual-current protection is chosen for personnel
C.Five safety rules — NFPA 70E categories 1 to 4 correspond to arc ratings of 4, 8, 25 and 40 cal/cm², selected from the incident energy calculated at the working distance
D.Five safety rules — isolate, secure against reconnection, verify dead with a tested detector, earth and short-circuit, then screen adjacent live parts, in that order before any work
A.each worker fits a personal lock and tag on every isolation point after switching off and testing for dead, so no one can re-energise the circuit until the last lock is removed
B.full-body harness with double lanyard anchored above about 1.8 m, ladders at a 4:1 slope, and no work near live overhead lines from ladders or structures without a permit and discharge
C.isolate, secure against reconnection, verify dead with a tested detector, earth and short-circuit, then screen adjacent live parts, in that order before any work
D.CEA Safety Regulations require every fatal or non-fatal electrical accident to be reported to the Electrical Inspector within 48 hours, followed by a detailed written report
5. Which term means: "each worker fits a personal lock and tag on every isolation point after switching off and testing for dead, so no one can re-energise the circuit until the last lock is removed"?
A.Lockout-tagout — Indian recommendations on safety procedures and practices in electrical work, Part 1 general and Part 2 life-saving techniques including rescue and artificial respiration
B.Lockout-tagout — IEC 60479 places the onset of fibrillation near 30–50 mA for a few hundred milliseconds, which is why 30 mA residual-current protection is chosen for personnel
C.Lockout-tagout — each worker fits a personal lock and tag on every isolation point after switching off and testing for dead, so no one can re-energise the circuit until the last lock is removed
D.Lockout-tagout — CEA schedule of minimum distances from exposed live parts for work: 2.6 m at 12 kV, 2.8 m at 36 kV, 3.1 m at 72.5 kV, 3.7 m at 145 kV, 4.3 m at 245 kV and 6.4 m at 420 kV
A.isolate, secure against reconnection, verify dead with a tested detector, earth and short-circuit, then screen adjacent live parts, in that order before any work
B.formal authorisation by an issuer to a receiver listing the isolations, earths and safe zone, held live until the receiver returns it and the issuer cancels it before re-energisation
C.CEA Safety Regulations require every fatal or non-fatal electrical accident to be reported to the Electrical Inspector within 48 hours, followed by a detailed written report
D.CEA schedule of minimum distances from exposed live parts for work: 2.6 m at 12 kV, 2.8 m at 36 kV, 3.1 m at 72.5 kV, 3.7 m at 145 kV, 4.3 m at 245 kV and 6.4 m at 420 kV
8. Which term means: "formal authorisation by an issuer to a receiver listing the isolations, earths and safe zone, held live until the receiver returns it and the issuer cancels it before re-energisation"?
A.Permit-to-work — formal authorisation by an issuer to a receiver listing the isolations, earths and safe zone, held live until the receiver returns it and the issuer cancels it before re-energisation
B.Permit-to-work — each worker fits a personal lock and tag on every isolation point after switching off and testing for dead, so no one can re-energise the circuit until the last lock is removed
C.Permit-to-work — isolate, secure against reconnection, verify dead with a tested detector, earth and short-circuit, then screen adjacent live parts, in that order before any work
D.Permit-to-work — NFPA 70E categories 1 to 4 correspond to arc ratings of 4, 8, 25 and 40 cal/cm², selected from the incident energy calculated at the working distance
A.NFPA 70E categories 1 to 4 correspond to arc ratings of 4, 8, 25 and 40 cal/cm², selected from the incident energy calculated at the working distance
B.formal authorisation by an issuer to a receiver listing the isolations, earths and safe zone, held live until the receiver returns it and the issuer cancels it before re-energisation
C.isolate, secure against reconnection, verify dead with a tested detector, earth and short-circuit, then screen adjacent live parts, in that order before any work
D.CEA Safety Regulations require every fatal or non-fatal electrical accident to be reported to the Electrical Inspector within 48 hours, followed by a detailed written report
11. Which term means: "CEA Safety Regulations require every fatal or non-fatal electrical accident to be reported to the Electrical Inspector within 48 hours, followed by a detailed written report"?
A.Electrical accident reporting — CEA Safety Regulations require every fatal or non-fatal electrical accident to be reported to the Electrical Inspector within 48 hours, followed by a detailed written report
B.Electrical accident reporting — formal authorisation by an issuer to a receiver listing the isolations, earths and safe zone, held live until the receiver returns it and the issuer cancels it before re-energisation
C.Electrical accident reporting — CEA schedule of minimum distances from exposed live parts for work: 2.6 m at 12 kV, 2.8 m at 36 kV, 3.1 m at 72.5 kV, 3.7 m at 145 kV, 4.3 m at 245 kV and 6.4 m at 420 kV
D.Electrical accident reporting — NFPA 70E categories 1 to 4 correspond to arc ratings of 4, 8, 25 and 40 cal/cm², selected from the incident energy calculated at the working distance
A.isolate, secure against reconnection, verify dead with a tested detector, earth and short-circuit, then screen adjacent live parts, in that order before any work
B.each worker fits a personal lock and tag on every isolation point after switching off and testing for dead, so no one can re-energise the circuit until the last lock is removed
C.Indian recommendations on safety procedures and practices in electrical work, Part 1 general and Part 2 life-saving techniques including rescue and artificial respiration
D.NFPA 70E categories 1 to 4 correspond to arc ratings of 4, 8, 25 and 40 cal/cm², selected from the incident energy calculated at the working distance
14. Which term means: "NFPA 70E categories 1 to 4 correspond to arc ratings of 4, 8, 25 and 40 cal/cm², selected from the incident energy calculated at the working distance"?
A.Arc flash PPE categories — Indian recommendations on safety procedures and practices in electrical work, Part 1 general and Part 2 life-saving techniques including rescue and artificial respiration
B.Arc flash PPE categories — NFPA 70E categories 1 to 4 correspond to arc ratings of 4, 8, 25 and 40 cal/cm², selected from the incident energy calculated at the working distance
C.Arc flash PPE categories — IEC 60479 places the onset of fibrillation near 30–50 mA for a few hundred milliseconds, which is why 30 mA residual-current protection is chosen for personnel
D.Arc flash PPE categories — isolate, secure against reconnection, verify dead with a tested detector, earth and short-circuit, then screen adjacent live parts, in that order before any work
A.Indian recommendations on safety procedures and practices in electrical work, Part 1 general and Part 2 life-saving techniques including rescue and artificial respiration
B.each worker fits a personal lock and tag on every isolation point after switching off and testing for dead, so no one can re-energise the circuit until the last lock is removed
C.IEC 60479 places the onset of fibrillation near 30–50 mA for a few hundred milliseconds, which is why 30 mA residual-current protection is chosen for personnel
D.CEA Safety Regulations require every fatal or non-fatal electrical accident to be reported to the Electrical Inspector within 48 hours, followed by a detailed written report
17. Which term means: "Indian recommendations on safety procedures and practices in electrical work, Part 1 general and Part 2 life-saving techniques including rescue and artificial respiration"?
A.IS 5216 — Indian recommendations on safety procedures and practices in electrical work, Part 1 general and Part 2 life-saving techniques including rescue and artificial respiration
B.IS 5216 — isolate, secure against reconnection, verify dead with a tested detector, earth and short-circuit, then screen adjacent live parts, in that order before any work
C.IS 5216 — CEA schedule of minimum distances from exposed live parts for work: 2.6 m at 12 kV, 2.8 m at 36 kV, 3.1 m at 72.5 kV, 3.7 m at 145 kV, 4.3 m at 245 kV and 6.4 m at 420 kV
D.IS 5216 — each worker fits a personal lock and tag on every isolation point after switching off and testing for dead, so no one can re-energise the circuit until the last lock is removed
A.formal authorisation by an issuer to a receiver listing the isolations, earths and safe zone, held live until the receiver returns it and the issuer cancels it before re-energisation
B.full-body harness with double lanyard anchored above about 1.8 m, ladders at a 4:1 slope, and no work near live overhead lines from ladders or structures without a permit and discharge
C.NFPA 70E categories 1 to 4 correspond to arc ratings of 4, 8, 25 and 40 cal/cm², selected from the incident energy calculated at the working distance
D.CEA schedule of minimum distances from exposed live parts for work: 2.6 m at 12 kV, 2.8 m at 36 kV, 3.1 m at 72.5 kV, 3.7 m at 145 kV, 4.3 m at 245 kV and 6.4 m at 420 kV
20. Which term means: "CEA schedule of minimum distances from exposed live parts for work: 2.6 m at 12 kV, 2.8 m at 36 kV, 3.1 m at 72.5 kV, 3.7 m at 145 kV, 4.3 m at 245 kV and 6.4 m at 420 kV"?
A.Safety working clearance — each worker fits a personal lock and tag on every isolation point after switching off and testing for dead, so no one can re-energise the circuit until the last lock is removed
B.Safety working clearance — formal authorisation by an issuer to a receiver listing the isolations, earths and safe zone, held live until the receiver returns it and the issuer cancels it before re-energisation
C.Safety working clearance — Indian recommendations on safety procedures and practices in electrical work, Part 1 general and Part 2 life-saving techniques including rescue and artificial respiration
D.Safety working clearance — CEA schedule of minimum distances from exposed live parts for work: 2.6 m at 12 kV, 2.8 m at 36 kV, 3.1 m at 72.5 kV, 3.7 m at 145 kV, 4.3 m at 245 kV and 6.4 m at 420 kV
A.NFPA 70E categories 1 to 4 correspond to arc ratings of 4, 8, 25 and 40 cal/cm², selected from the incident energy calculated at the working distance
B.isolate, secure against reconnection, verify dead with a tested detector, earth and short-circuit, then screen adjacent live parts, in that order before any work
C.CEA schedule of minimum distances from exposed live parts for work: 2.6 m at 12 kV, 2.8 m at 36 kV, 3.1 m at 72.5 kV, 3.7 m at 145 kV, 4.3 m at 245 kV and 6.4 m at 420 kV
D.IEC 60479 places the onset of fibrillation near 30–50 mA for a few hundred milliseconds, which is why 30 mA residual-current protection is chosen for personnel
23. Which term means: "IEC 60479 places the onset of fibrillation near 30–50 mA for a few hundred milliseconds, which is why 30 mA residual-current protection is chosen for personnel"?
A.Ventricular fibrillation threshold — CEA schedule of minimum distances from exposed live parts for work: 2.6 m at 12 kV, 2.8 m at 36 kV, 3.1 m at 72.5 kV, 3.7 m at 145 kV, 4.3 m at 245 kV and 6.4 m at 420 kV
B.Ventricular fibrillation threshold — CEA Safety Regulations require every fatal or non-fatal electrical accident to be reported to the Electrical Inspector within 48 hours, followed by a detailed written report
C.Ventricular fibrillation threshold — Indian recommendations on safety procedures and practices in electrical work, Part 1 general and Part 2 life-saving techniques including rescue and artificial respiration
D.Ventricular fibrillation threshold — IEC 60479 places the onset of fibrillation near 30–50 mA for a few hundred milliseconds, which is why 30 mA residual-current protection is chosen for personnel
A.NFPA 70E categories 1 to 4 correspond to arc ratings of 4, 8, 25 and 40 cal/cm², selected from the incident energy calculated at the working distance
B.CEA schedule of minimum distances from exposed live parts for work: 2.6 m at 12 kV, 2.8 m at 36 kV, 3.1 m at 72.5 kV, 3.7 m at 145 kV, 4.3 m at 245 kV and 6.4 m at 420 kV
C.CEA Safety Regulations require every fatal or non-fatal electrical accident to be reported to the Electrical Inspector within 48 hours, followed by a detailed written report
D.full-body harness with double lanyard anchored above about 1.8 m, ladders at a 4:1 slope, and no work near live overhead lines from ladders or structures without a permit and discharge
26. Which term means: "full-body harness with double lanyard anchored above about 1.8 m, ladders at a 4:1 slope, and no work near live overhead lines from ladders or structures without a permit and discharge"?
A.Working at height — NFPA 70E categories 1 to 4 correspond to arc ratings of 4, 8, 25 and 40 cal/cm², selected from the incident energy calculated at the working distance
B.Working at height — Indian recommendations on safety procedures and practices in electrical work, Part 1 general and Part 2 life-saving techniques including rescue and artificial respiration
C.Working at height — formal authorisation by an issuer to a receiver listing the isolations, earths and safe zone, held live until the receiver returns it and the issuer cancels it before re-energisation
D.Working at height — full-body harness with double lanyard anchored above about 1.8 m, ladders at a 4:1 slope, and no work near live overhead lines from ladders or structures without a permit and discharge
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